Unit G: Protista

General Protist Characteristics

1. Eukaryotic or Prokaryotic

2. How classified

3. Theory

How classified

1. Eukaryotic

2. Through animal/plant/fungi like features

3. endosymbiotic theory= eukaryotic cells evolved from prokaryotic cells

Describe the endosymbiotic theory and how is it proven

Protists (Eukaryotic cells) evolved from prokaryotic cells. Large prokaryotic cell eats a smaller one. Symbiotic relationship created, Small become “organs” of mitochondria and chloroplasts.

Proven as mitochondria and chloroplasts contain unique DNA from nucleus; have their own plasma membranes.

What groups are protists organized into

Animal-like (Protozoa)

Plant-like (Algae)

Fungi-like (Slime and water molds)

Importance of Protists

• (Protozoa) Consume bacteria and other protists

  • Components of aquatic and soil food webs

  • helps with recycling

Animal-like Protist characteristics:

1. Name

2. How classified

1. Protozoas

2. By movement: Pseudopods, Cilliates, Flagellates, Sprozoans

Pseudopods:

1. Name

2. How they move and eat

3. Traits

4. Examples

5. Diseases?

1. Sarcodina

2. Move and eat through Pseudopods (false feet) through phagocytosis (process of engulfing)

3. lit js the amoeba

4. Amoeba (consumer, lives in ponds puddles and people, reproduce through binary fission)

5. Entamoeba OR amoebic dysentery (go to brain liver or lungs n eat. )

Cilliates

1. Scientific name

2. How they move and eat

3. Traits

4. Examples

5. Diseases?

1. Cillophora

2. Through cilla (tiny hairs)

3. Contractile vacuoles, binary fission + conjugation, mouths and feeding pores

4. Paramecium (consumers, ponds, pellicle-cant change shape, 2 nuclei-macro and micro)

5. HARMLESS

Flagellates

1. Name

2. How they move and eat

3. Traits

4. Examples

5. Diseases?

1. Zoomastigina

2. MOVE: through flagella (whip like tail)

3. Can be symbiotic

Sporozoans

1. Name

2. How they move and eat

3. Traits

4. Examples

5. Diseases?

1. Sporozoans

2. Can’t move

3. Form spores AND cysts??? All parasites,

4. Plasmodium=Maleria (vector=mosquitos),

Characteristics of Plant like Protists

• photosynthetic

• basically Algae

• no roots or leaves

• classified by colour of algae / cell wall

Chlorophyta

• contains chlorophyll

• green algae

• sexual reproduction

Phaeophyta

• Brown algae

• Kelp

• Multicellular

Rhodophyta

• Red algae

Dinoflagella

• Fire al-gae

• 2 Flagella

• Bioluminescent or release toxins

• Includes peridinium which creates red tide

Bacillariophyta

• Glass diatoms

Euglenophyta

• Fresh water

• animal and plant like

• Eyespot (swim towards light)

• Become heterotrophic when no light

Chrysophyta

• golden yellow

Fungi like Protist characteristics

• reproduce by sores

• - also “phyla”

• Suffix of “mycota”

Cellular Slime Molds

1. Name

2. Process

3. Reproduction

1. Acrasiomycota

2. Spores → amoebas

3. no food, creates AMP, unifies into a slug, creates spores, splits, repeats

Plasmodial Slime Mold

1. Name

2. Process

3. Reproduction

1. Mycomycota

2. Same as Cellular but born as a group

Water Mold

1. name

2. Trait

3. Financial effect

1. Oomycota

2. Parasitic, Cellulose cell walls

3. Started Irish potato famine (was in soil n destroyed plants n killed people)

Desmids

A type of green algae